Effects of agronomic treatments on functional diversity of soil microbial community and microbial activity in a revegetated coal mine spoil

Geoderma ◽  
2019 ◽  
Vol 338 ◽  
pp. 40-47 ◽  
Author(s):  
Pramod Shrestha ◽  
Resham Gautam ◽  
Nanjappa Ashwath
Keyword(s):  
Microbial Community ◽  
Microbial Activity ◽  
Functional Diversity ◽  
Coal Mine ◽  
Soil Microbial Community ◽  
Mine Spoil ◽  
Soil Microbial

scholarly journals Soil Microbial Community Changes in a Field Treatment with Chlorotoluron, Flufenacet and Diflufenican and Two Organic Amendments

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1166
Author(s):  
María José Carpio ◽  
Carlos García-Delgado ◽  
Jesús María Marín-Benito ◽  
María Jesús Sánchez-Martín ◽  
María Sonia Rodríguez-Cruz
Keyword(s):  
Microbial Community ◽  
Microbial Biomass ◽  
Microbial Activity ◽  
Soil Microbial Community ◽  
Organic Amendments ◽  
Herbicide Application ◽  
Amended Soils ◽  
Soil Microbial ◽  
Unamended Soil ◽  
Over Time

The soil microbial activity, biomass and structure were evaluated in an unamended (S) and organically amended soil treated with two commercial formulations of the herbicides chlorotoluron (Erturon®) and flufenacet plus diflufenican (Herold®) under field conditions. Soils were amended with spent mushroom substrate (SMS) or green compost (GC). Soil microbial dehydrogenase activity (DHA), biomass and structure determined by the phospholipid fatty acid (PLFA) profiles were recorded at 0, 45, 145, 229 and 339 days after herbicide treatment. The soil DHA values steadily decreased over time in the unamended soil treated with the herbicides, while microbial activity was constant in the amended soils. The amended soils recorded higher values of concentrations of PLFAs. Total soil microbial biomass decreased over time regardless of the organic amendment or the herbicide. Herbicide application sharply decreased the microbial population, with a significant modification of the microbial structure in the unamended soil. In contrast, no significant differences in microbial biomass and structure were detected in S + SMS and S + GC, untreated or treated with herbicides. The application of SMS and GC led to a significant shift in the soil microbial community regardless of the herbicides. The use of SMS and GC as organic amendments had a certain buffer effect on soil DHA and microbial biomass and structure after herbicide application due to the higher adsorption capacity of herbicides by the amended soils.

Soil Microbial Functional Diversity from Different Infection Grades of Banana Fusarium Wilt (Fusarium oxysporum f. sp. Cubense)

2013 ◽  
Vol 295-298 ◽  
pp. 2274-2280 ◽  
Author(s):  
Xiao Deng ◽  
Qin Fen Li ◽  
Xian Wen Hou ◽  
Chun Yuan Wu
Keyword(s):  
Microbial Community ◽  
Fusarium Oxysporum ◽  
Functional Diversity ◽  
Fusarium Wilt ◽  
Soil Microbial Community ◽  
Rhizosphere Soil ◽  
Principal Component ◽  
Soil Microbial ◽  
Metabolic Characteristics ◽  
Environmental Measures

Thirty rhizosphere and non-rhizosphere soil samples from different infection grades(0, I, III, V and VII) of three typical banana plots(Jianfeng, Shiyuetian, Chongpo) infected by banana fusarium wilt (Fusarium oxysporum f. sp. cubense) in Hainan province were collected to study the microbial community functional diversity applying Biolog-ECO microplates technology. The results are as follows: (1) Overall carbon source metabolic capacities of soil microbial community weaken with increasing of infection grades of banana fusarium wilt. (2) Richness indices, Simpson indices, Shannon indices and McIntosh indices of soil microbial community gradually decreased with increasing of infection grades of banana fusarium wilt. (3) Principal component analysis show that metabolic characteristics of soil microbial community significantly change between the healthy plants and diseased plants in the same banana plot. The results would provide information for explaining the pathogenesis of banana fusarium wilt and controlling its incidence by applying microbial ecology to regulate soil environmental measures.

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